Table 2.

ICC values for intertester reliability

		IPD	PPD	SPD	FOT	FCT
Single Task	Elderly N = 16	0.79***	0.76***	0.64**	0.82***	0.82***
	Younger N = 24	0.70***	0.78***	0.46**	0.79***	0.78***
	Pooled N = 40	0.86***	0.81***	0.60***	0.87***	0.84***
Dual Task	Elderly N = 16	0.70***	0.70***	0.32 ns	0.83***	0.74***
	Younger N = 24	0.73***	0.88***	0.77***	0.68***	0.82***
	Pooled N = 40	0.79***	0.82***	0.55*	0.88***	0.86***

Table 2 shows ICC(2,1) values and significance levels (in parenthesis) for intertester reliability (Rater 1 vs. Rater 2) for step execution parameters Initiation Phase Duration (IPD), Preparatory Phase Duration (PPD), Swing Phase Duration (SPD), Foot-Off Time (FOT) and Foot-Contact Time (FCT) under single and dual task conditions calculated separately for elderly subjects (N = 16), younger adult subjects (N = 24) and the pooled population of elderly and younger adult subjects (N = 40). An average of all six step trials (three forward and three backward) was used in the analysis (ns – not significant, *p < 0.05, **p < 0.01, ***p < 0.001).